Right click on Start       Button and click System

The About page will open, scroll down to see more details

Under the Device specifications , you can see if your Windows 10 is 32-bit operation system or a 64-bit operation system

Under the Windows Specifications , you will have information related to Edition, Version and OS Build


Edition:  The “Edition” line tells you which edition of Windows 10 you’re using — Windows 10 Home, Professional, Enterprise, or Education. If you’d like to upgrade to Windows 10 Professional, you can upgrade to the Professional edition from within Windows 10. Switching to Windows 10 Enterprise or Education editions will require a complete reinstall and a special key that isn’t made available to normal home Windows users.

Build Number: Look at the “Version” and “OS Build” lines. If you have the original version of Windows 10, you’ll just see “OS Build 10240”. This was the initial release of Windows 10. If you have the “November Update” version of Windows 10 — Windows 10’s first big update— you’ll see a new version number scheme here. It’ll say “Version 1511 (OS Build 10576.29)”.
The “1511” is the key. This number identifies that you’re using the build of Windows 10 released in November (the 11th month) of 2015.
In my case, my Windows 10 is version 1909 which is the November 2019 Update ( Please check below table )

64-bit or 32-bit: The “System type” line tells you whether you’re using the 32-bit version of Windows 10 or the 64-bit version. It also tells you whether your PC is compatible with the 64-bit version or not.
For example, “64-bit operating system, x64-based processor” indicates you’re using a 64-bit version of Windows 10 on a 64-bit processor. “32-bit operating system, x64-based processor” indicates you’re using a 32-bit version of Windows 10, but you could install the 64-bit version on your hardware if you preferred.

Here is a table summarizing Windows 10 versions